Norna Robertson, Stephen Appert || 29 Nov 2017, 2 pm to 4 pm || 227 Downs, CIT
We made some preparations for modal testing, but did not have enough time to make measurements. Below is an after-the-fact log, including some observations and photos of the current state of the OMC bench.
- Previous testing results at T1700471 (technical note in progress as of 30 Nov 2017).
- One goal of the next round: add damping material to equate with damping material of T1600494.
- Second goal of the next round: use a more localized sweep to better resolve the body mode around 1080 Hz -1100 Hz
- Transport Fixture was opened without issue, revealing the "Top" (suspending and cable routing) surface of the bench. Damping stacks were still in place from previous testing
- We removed the bolts from the damper stacks, but found that all masses with metal-viton interfaces had adhered to viton washers, causing the stacks to stick together.
- By using an allen key as a lever to wedge apart bottom mass and the bracket where they were joined by a viton washer, we separated the masses from the bracket.
- An allen key was used as a lever to push apart the two masses, which were also joined by a viton washer
- Once exposed, viton washers were pried from metal surfaces.
- After the damper stacks had been detached from the No viton washer appeared to leave any residue or particulate - the separated parts all appeared as clean as they had been at the onset.
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